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[ Upstream commite9c0b96ec0] Under some circumstances, such as when a server socket is closing, ABORT packets will be generated in response to incoming packets. Unfortunately, this also may include generating aborts in response to incoming aborts - which may cause a cycle. It appears this may be made possible by giving the client a multicast address. Fix this such that rxrpc_reject_packet() will refuse to generate aborts in response to aborts. Fixes:248f219cb8("rxrpc: Rewrite the data and ack handling code") Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Jeffrey Altman <jaltman@auristor.com> cc: Marc Dionne <marc.dionne@auristor.com> cc: Junvyyang, Tencent Zhuque Lab <zhuque@tencent.com> cc: LePremierHomme <kwqcheii@proton.me> cc: Linus Torvalds <torvalds@linux-foundation.org> cc: Simon Horman <horms@kernel.org> cc: linux-afs@lists.infradead.org Link: https://patch.msgid.link/20250717074350.3767366-5-dhowells@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>